Correct spark plugs for 1994 Pro Star 205

[colrhino]

Good morning everyone,
Having a hard time finding the recommended spark plugs for my 1994 Pro Star 205. Also, will this engine/ignition system support using the iridium style spark plugs and f I can find a cross reference based on the original plug specifications? Thank you.

[88 PS190]

Which engine? Google 1994 indmar engine manual and you can look up all ya need about the engine service.

If base 5.7 AC delco mr43t or cross.

[Ski-me]

Here's the manual for your boat. Download and print it off. I use it all the time!

https://www.mastercraft.com/manuals/download/32/1994_mastercraft_owners_manual_prostars.pdf

I'll assume you have the standard engine, your plug would be the AC Delco MR43T

Mine is the LT1 and I use AC Delco MR43LTS

[Engine Nut]

Good morning everyone,
Having a hard time finding the recommended spark plugs for my 1994 Pro Star 205. Also, will this engine/ignition system support using the iridium style spark plugs and f I can find a cross reference based on the original plug specifications? Thank you.

You really won't see a benefit in using platinum or iridium plugs in the engines without catalytic converter exhaust. Those engines rum pretty rich and platinum and iridium plugs like to be a little on the lean side. Stay with conventional plugs in your 1994 engine ... either MR43T if you have a TBI or MR43LTS if you have an LT-1.

[mikeg205]

You really won't see a benefit in using platinum or iridium plugs in the engines without catalytic converter exhaust. Those engines rum pretty rich and platinum and iridium plugs like to be a little on the lean side. Stay with conventional plugs in your 1994 engine ... either MR43T if you have a TBI or MR43LTS if you have an LT-1.

Enginenut??!!! Great to see you here!

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